TRB's National Cooperative Highway Research Program (NCHRP) Research Report 875: Guidance for Evaluating the Safety Impacts of Intersection Sight Distance is a resource for practitioners involved in the planning, design, operations, and traffic safety management of stop-controlled intersections. It provides information on how to estimate the effect of intersection sight distance (ISD) on crash frequency at intersections and describes data collection methods and analysis steps for making safety-informed decisions about ISD. The guidance also provides basic information on the importance of ISD that can be shared with decision makers and other stakeholders.
Accompanying the report, NCHRP Web-Only Document 228: Safety Impacts of Intersection Sight Distance documents the methodology and presents the results from the underlying research on estimating the safety effects of ISD at stop-controlled intersections. To establish the relationship between ISD and safety at stop-controlled intersections, crash, traffic, and geometric data were collected for 832 intersection approaches with minor-road stop control in North Carolina, Ohio, and Washington. A PowerPoint presentation that describes the project also accompanies the report and web-only document.
Table of Contents |
skim chapter | |
|---|---|---|
| Front Matter | i-vii | |
| Summary | 1-2 | |
| Chapter 1 - Introduction | 3-7 | |
| Chapter 2 - Measuring Sight Distance and Other Critical Information | 8-13 | |
| Chapter 3 - Safety Performance and Intersection Sight Distance | 14-23 | |
| Chapter 4 - Examples | 24-31 | |
| Chapter 5 - Other Considerations and Resources | 32-33 | |
| Chapter 6 - Base Equations for Reference | 34-35 | |
| References | 36-38 | |
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